Merge pull request #610 from QuantumFusion-network/alexlgn/554-create-arch-diagram-testnet-fastnet-paseo

Architecture Diagram for Testnet, Fastnet, and Paseo

Author: AlexLgn

docs/TestNet_infra/TestNet.drawio

@@ -0,0 +1,38 @@
+# Brief
+
+Complete system architecture documentation & references for QF TestNet with Paseo relay chain integration.
+
+![Testnet with Paseo diagram](https://github.com/QuantumFusion-network/spec/blob/main/docs/TestNet_infra/Testnet_w_Paseo.png)
+
+# Description
+
+### TestNet public infra:
+- 3 Validator Servers:
+    - qf-validator-node: Testnet validator
+    - qf-paseo-collator-node: Parachain collator interfacing with Paseo relay chain
+    - qf-fast-validator-node: Fastnet validator
+    - Monitoring stack (Grafana, Prometheus, Promtail)
+- 1 RPC & Monitoring Server:
+    - qf-paseo-rpc-node-1: Paseo relay chain RPC endpoint
+    - qf-node-rpc-3: QF full node with RPC
+    - qf-node-archive-3: QF archive node
+    - Monitoring Stack (Grafana, Prometheus, Loki)
+- Telemetry Server (telemetry.qfnetwork.xyz) for external network monitoring and observability.
+
+### TestNet internal infra:
+- P2P Network connecting all validator servers.
+- Monitoring & alerting architecture.
+- All network communication are strongly controlled by ACL/FW.
+- CI/CD based on [GitHub actions](https://github.com/QuantumFusion-network/infra/blob/main/docs/provisioning_and_telemetry.md).
+- SSH Key-Based Authentication for all administrative access
+- Secret & password manager with [access control](https://github.com/QuantumFusion-network/infra/blob/main/docs/key_management_basic.md) is [Bitwarden](https://bitwarden.com).
+
+### Additional information:
+- [TCO of TestNet (only for team members)](https://github.com/QuantumFusion-network/infra/blob/main/docs/testnet_tco_mar_2025.md)
+- [Provisioning & CI/CD](https://github.com/QuantumFusion-network/infra/blob/main/docs/provisioning_and_telemetry.md)
+- [How we work with versions & upstream updates](https://github.com/QuantumFusion-network/spec/blob/main/docs/proc/how_we_work_in_the_team.md)
+
+**Outdated versions**
+- [Testnet schema as a drawio file](https://github.com/QuantumFusion-network/spec/blob/9aba1a9613b2be64b1081698393f9fe6589b1920/docs/TestNet_infra/TestNet.drawio)
+- [Testnet schema as a png file](https://github.com/QuantumFusion-network/spec/blob/9aba1a9613b2be64b1081698393f9fe6589b1920/docs/TestNet_infra/TestNet.drawio.png)
+- [Testnet schema description](https://github.com/QuantumFusion-network/spec/blob/9aba1a9613b2be64b1081698393f9fe6589b1920/docs/TestNet_infra/test_net.md)